Abstract
Noise reduction in urban areas requires integral and interdisciplinary approaches. When it comes to the acoustic performance of facade systems, mostly their potential as sound barrier and sound insulator is considered. The objective of this master thesis is to analyze the acoustic potential of facades regarding sound absorption. Therefore facade systems and noise absorbers are compared to determine common design features and constructional options.
To evaluate the sound absorption of claddings and thermal insulation materials measurements of the absorption coefficient with a square impedance tube and of the flow resistance were performed. The measured data is contrasted with the results of computer modeling and the actual traffic noise spectrum. The acoustic models that serve as a basis for the calculations are porous absorber, panel resonator, perforated panel-, and slit panel absorber.
The exemplarily investigated thermal insulation materials include rock wool, wood fibers, wood wool, expanded perlite, foamed glass, cellular glass, REAPOR®, expanded polystyrene and polyurethane foam. Furthermore, the acoustic characteristics of thermal insulation systems and construction elements of multi-layered facade systems such as underlays (flexible sheets for waterproofing), gabions with foam glass gravel, perforated and micro perforated metal plates are examined.
In conclusion potential measures for activating or improving the sound absorption characteristics of those constructions are mentioned and an outlook to other systems is given.
To evaluate the sound absorption of claddings and thermal insulation materials measurements of the absorption coefficient with a square impedance tube and of the flow resistance were performed. The measured data is contrasted with the results of computer modeling and the actual traffic noise spectrum. The acoustic models that serve as a basis for the calculations are porous absorber, panel resonator, perforated panel-, and slit panel absorber.
The exemplarily investigated thermal insulation materials include rock wool, wood fibers, wood wool, expanded perlite, foamed glass, cellular glass, REAPOR®, expanded polystyrene and polyurethane foam. Furthermore, the acoustic characteristics of thermal insulation systems and construction elements of multi-layered facade systems such as underlays (flexible sheets for waterproofing), gabions with foam glass gravel, perforated and micro perforated metal plates are examined.
In conclusion potential measures for activating or improving the sound absorption characteristics of those constructions are mentioned and an outlook to other systems is given.
| Original language | German |
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| Qualification | Master of Science |
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| Publication status | Published - Jan 2017 |